Three charges are arranged along the x-axis: +q at x = -2d; +2q at x = d; –4q at x = 2d. Which expression gives the magnitude of the electric field at the origin (x = 0)? In the expressions below, the constant 1/(4πϵ0) has been replaced with k.
A. 5kq / 4d2
B. 11kq / 4d2
C. 13kq / 4d2
D. 3kq / 4d2
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Electric Field concept. You can view video lessons to learn Electric Field. Or if you need more Electric Field practice, you can also practice Electric Field practice problems.
How long does this problem take to solve?
Our expert Physics tutor, Juan took 4 minutes and 56 seconds to solve this problem. You can follow their steps in the video explanation above.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Adams' class at AU.